Spending the night with my boyfriend

So I just turned 22 and my boyfriend and I had thought that since we were gonna be going to dinner pretty late that instead of driving me all the way home, I could just spend the night. And of course I was all for it. However this isn’t the first time he asked me to spend the night and my answer has been the same because of my parents. My parents won’t let me spend the night with him because they dont believe in it and only want me to do it if I’m way older.nEven though I’m technically old enough and have always been responsible. I honestly just need some advice or insight on how I can go about asking them or just telling them that I am. I’m afraid that they’ll get mad at me and kick me out or tell my family about it. Any advice helps 😬